/*  vector3.cpp                                                          */


#include "vector3.h"

#include "core/math/basis.h"

void Vector3::rotate(const Vector3 &p_axis, real_t p_phi) {
	*this = Basis(p_axis, p_phi).xform(*this);
}

Vector3 Vector3::rotated(const Vector3 &p_axis, real_t p_phi) const {
	Vector3 r = *this;
	r.rotate(p_axis, p_phi);
	return r;
}

void Vector3::set_axis(int p_axis, real_t p_value) {
	ERR_FAIL_INDEX(p_axis, 3);
	coord[p_axis] = p_value;
}
real_t Vector3::get_axis(int p_axis) const {
	ERR_FAIL_INDEX_V(p_axis, 3, 0);
	return operator[](p_axis);
}

void Vector3::snap(const Vector3 &p_val) {
	x = Math::stepify(x, p_val.x);
	y = Math::stepify(y, p_val.y);
	z = Math::stepify(z, p_val.z);
}
Vector3 Vector3::snapped(const Vector3 &p_val) const {
	Vector3 v = *this;
	v.snap(p_val);
	return v;
}

Vector3 Vector3::limit_length(const real_t p_len) const {
	const real_t l = length();
	Vector3 v = *this;
	if (l > 0 && p_len < l) {
		v /= l;
		v *= p_len;
	}

	return v;
}

Vector3 Vector3::move_toward(const Vector3 &p_to, const real_t p_delta) const {
	Vector3 v = *this;
	Vector3 vd = p_to - v;
	real_t len = vd.length();
	return len <= p_delta || len < (real_t)CMP_EPSILON ? p_to : v + vd / len * p_delta;
}

Basis Vector3::outer(const Vector3 &p_b) const {
	Vector3 row0(x * p_b.x, x * p_b.y, x * p_b.z);
	Vector3 row1(y * p_b.x, y * p_b.y, y * p_b.z);
	Vector3 row2(z * p_b.x, z * p_b.y, z * p_b.z);

	return Basis(row0, row1, row2);
}

Basis Vector3::to_diagonal_matrix() const {
	return Basis(x, 0, 0,
			0, y, 0,
			0, 0, z);
}

Vector3 Vector3::clamp(const Vector3 &p_min, const Vector3 &p_max) const {
	return Vector3(
			CLAMP(x, p_min.x, p_max.x),
			CLAMP(y, p_min.y, p_max.y),
			CLAMP(z, p_min.z, p_max.z));
}

bool Vector3::is_equal_approx(const Vector3 &p_v) const {
	return Math::is_equal_approx(x, p_v.x) && Math::is_equal_approx(y, p_v.y) && Math::is_equal_approx(z, p_v.z);
}

Vector3::operator String() const {
	return "(" + String::num_real(x) + ", " + String::num_real(y) + ", " + String::num_real(z) + ")";
}